(LEAD) N. Korea says it has conducted hydrogen bomb test

SEOUL, Jan. 6 (Yonhap) -- North Korea announced Wednesday it has succeeded in conducting a hydrogen bomb test, hours after what seems to be an artificial earthquake was detected close to the North's nuclear test site.

In a "special" announcement aired on the North's state television station, North Korea said it conducted an H-bomb test at 10:00 a.m. (Pyongyang Time).